Malicious PDF — malware analysis report

Static analysis result for SHA-256 4716e686bc1a5966…

MALICIOUS

PDF

46.5 KB Created: 2020-09-01 09:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec587cba01ef0503ce5cac55e92f5f15 SHA-1: 88273b834d47e13d95325edcacb1cc0084fc38cc SHA-256: 4716e686bc1a59667c98c159426386149bc8d9dfc64ef6c3328d38585714ed31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, hosting numerous external PDF links, with 'cdn.shopify.com' being a dominant host. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users through a deceptive link, likely for further malicious redirection or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=persona+5+flower+shop+request+guide
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/oxford_dictionary_of_sociology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/46540228964.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/bojejuzomerozabururelalej.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/judilikigikapabalosumolut.pdf
    • https://cdn.shopify.com/s/files/1/0433/5088/4505/files/bonebep.pdf
    • https://cdn.shopify.com/s/files/1/0431/9923/4203/files/cake_by_the_ocean_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/88992883782.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/oxford_picture_dictionary_english_german.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8439/files/98679839573.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/book_of_mormon_japanese.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/ziregutirumewexusake.pdf
    • https://static.usrfiles.com/ugd/b8c837_17210462a724451698488763164e7bf8.pdf
    • https://static.usrfiles.com/ugd/b91566_076b15d97f684d06ab8653dd8a346b9b.pdf
    • https://static.usrfiles.com/ugd/3d0627_041ce73d3bba415ab7928468f9edb054.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ee.bin
1fb351b9ddf6acd532ed3227f054c22c6f1493f870365bec07149d05b0de9029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EE 5528 bytes
font_01_sfnt_off00007bb8.bin
a8913b23beeca8034e6fc1015012f1ca175eab9748a6d51cd3f5e21aa9828d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 10396 bytes
font_02_sfnt_off00009f3f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3F 4324 bytes

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